You can at your peril. There is a secret open source software credit detection routine built into both products. The license doesn’t explicitly say you have to keep it there. However I’ve heard of horrible things happening if you remove it. Open source programmers are very self centered, introverted and vindictive people.

According to a legend if you remove the copyright you will be captured by extra-terrestrials (Automattic team) and their chief (Mullenweg) will implante an electronic chip in your brain . the chip will generate the same song (downtown by petula clark) everytime a comment spam is send to a blog around the world.

(wheeze) I never should have come back to this thread. (wheeze) You guys are literally gonna kill me. You know I have asthma, a heart condition and psoriasis. (wheeze) Where’s my doctor’s number.. (giggling) There I go again. (wheeze) LOL.